一般现在时讲解
【作者:张教员,编号1991 点击数:2088 更新时间:2015-04-01】一般现在时
1. 定义:
A) 表示现在经常发生或习惯性的行为或状态,常与usually, always, every day, twice a week, seldom, sometimes等时间状语连用。
eg: He always sleeps with the windows open.
The children go to school at seven every morning.
B) 表示主语具有的特征、性格、能力和客观真理。
eg:I’m 14 years old .
He works hard .
She loves music.
C) 表示客观事实或普遍真理,也用在格言中。
eg:The sun rises in the east.。
Actions speak louder than words.
Water boils at 100℃
.注意:主句中的谓语动词是过去时态,但宾语从句中如果所说的是客观真理,它的谓语动词仍用一般现在时。
eg: Galileo insisted that the earth goes around the sun.
2. 时间词:
often usually always sometimes every day/night/week on Sunday on weekends
3. 结构:
A)当句子表状态说明主语是什么或怎么样时 其句型:主+be动词(am, is, are)+表语
否定式是在be动词后加not一般疑问句是将be动词提前到句首(即在主语之前)
eg: He is her father . He is not her father .
Is he her father? Yes, he is . No, he is not.
B)当谓语由实义动词充当, 主语不是第三人称单数时,
句子结构为:主语+动词原形+其它
否定式为:主语+don't+动词原形+其它
疑问句为:Do+主语+动词原形+其它?
eg. We speak Chinese. We don't speak Chinese.
Do you speak Chinese? Yes,we do. No, we don’t.
当主语是第三人称单数时:
句子结构为: 主语+动词(词尾加s或es)+其它
否定式为:主语+doesn't+动词原形+其它。
疑问句式:Does+主语+动词原形+其它?
eg:He likes pandas. He doesn’t like pandas.
Does he like pandas? Yes,he does. No, he doesn’t.
4. 动词三单形式的构成: 动词加s的方法与名词变复数的方法基本一样
(1)在原形动词结尾直接加s:works , runs , likes.plays
(2)以s , x , ch , sh , o 结尾的动词,加es:teaches , goes
(3)以辅音字母+y结尾的动词,把y变i再加es:studies 一般现在时大练兵
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